/*
- * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License, version 2 only, as
- * published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#define _LGPL_SOURCE
#include "lttng-sessiond.h"
#include "health-sessiond.h"
#include "thread.h"
+#include "testpoint.h"
+
+#include "kernel.h"
+#include <common/kernel-ctl/kernel-ctl.h>
#include <urcu.h>
#include <urcu/list.h>
#include <urcu/rculfhash.h>
+
+int trigger_consumption_paused;
/*
* Destroy the thread data previously created by the init function.
*/
PERROR("close kernel consumer channel monitoring pipe");
}
}
+
end:
free(handle);
}
+/*
+ * TODO: refactor this if needed. Lifetime of the kernel notification event source.
+ * The kernel_notification_monitor_fd ownwership remain to the main thread.
+ * This is because we need to close this fd before removing the modules.
+ */
struct notification_thread_handle *notification_thread_handle_create(
struct lttng_pipe *ust32_channel_monitor_pipe,
struct lttng_pipe *ust64_channel_monitor_pipe,
- struct lttng_pipe *kernel_channel_monitor_pipe)
+ struct lttng_pipe *kernel_channel_monitor_pipe,
+ int kernel_notification_monitor_fd)
{
int ret;
struct notification_thread_handle *handle;
} else {
handle->channel_monitoring_pipes.kernel_consumer = -1;
}
+
+ CDS_INIT_LIST_HEAD(&handle->event_trigger_sources.list);
+ ret = pthread_mutex_init(&handle->event_trigger_sources.lock, NULL);
+ if (ret) {
+ goto error;
+ }
end:
return handle;
error:
goto error;
}
if (handle->channel_monitoring_pipes.kernel_consumer < 0) {
- goto end;
+ goto skip_kernel_consumer;
}
ret = lttng_poll_add(poll_set,
handle->channel_monitoring_pipes.kernel_consumer,
ERR("[notification-thread] Failed to add kernel channel monitoring pipe fd to pollset");
goto error;
}
+
+skip_kernel_consumer:
end:
return ret;
error:
ret = cds_lfht_destroy(state->client_socket_ht, NULL);
assert(!ret);
}
+ if (state->client_id_ht) {
+ ret = cds_lfht_destroy(state->client_id_ht, NULL);
+ assert(!ret);
+ }
if (state->triggers_ht) {
ret = handle_notification_thread_trigger_unregister_all(state);
assert(!ret);
ret = cds_lfht_destroy(state->sessions_ht, NULL);
assert(!ret);
}
+ if (state->triggers_by_name_uid_ht) {
+ ret = cds_lfht_destroy(state->triggers_by_name_uid_ht, NULL);
+ assert(!ret);
+ }
+ if (state->trigger_tokens_ht) {
+ ret = cds_lfht_destroy(state->trigger_tokens_ht, NULL);
+ assert(!ret);
+ }
/*
* Must be destroyed after all channels have been destroyed.
* See comment in struct lttng_session_trigger_list.
notification_channel_socket_destroy(
state->notification_channel_socket);
}
+ if (state->executor) {
+ action_executor_destroy(state->executor);
+ }
lttng_poll_clean(&state->events);
}
memset(state, 0, sizeof(*state));
state->notification_channel_socket = -1;
+ state->trigger_id.token_generator = 1;
lttng_poll_init(&state->events);
ret = notification_channel_socket_create();
goto error;
}
+ state->client_id_ht = cds_lfht_new(DEFAULT_HT_SIZE, 1, 0,
+ CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL);
+ if (!state->client_id_ht) {
+ goto error;
+ }
+
state->channel_triggers_ht = cds_lfht_new(DEFAULT_HT_SIZE, 1, 0,
CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL);
if (!state->channel_triggers_ht) {
if (!state->triggers_ht) {
goto error;
}
+ state->triggers_by_name_uid_ht = cds_lfht_new(DEFAULT_HT_SIZE,
+ 1, 0, CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL);
+ if (!state->triggers_by_name_uid_ht) {
+ goto error;
+ }
+
+ state->trigger_tokens_ht = cds_lfht_new(DEFAULT_HT_SIZE,
+ 1, 0, CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL);
+ if (!state->trigger_tokens_ht) {
+ goto error;
+ }
+ state->executor = action_executor_create(handle);
+ if (!state->executor) {
+ goto error;
+ }
mark_thread_as_ready(handle);
end:
return 0;
return ret;
}
+static int handle_trigger_event_pipe(int fd,
+ enum lttng_domain_type domain,
+ uint32_t revents,
+ struct notification_thread_state *state)
+{
+ int ret = 0;
+
+ if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) {
+ ret = lttng_poll_del(&state->events, fd);
+ if (ret) {
+ ERR("[notification-thread] Failed to remove event monitoring pipe from poll set");
+ }
+ goto end;
+ }
+
+ if (testpoint(sessiond_handle_trigger_event_pipe)) {
+ ret = 0;
+ goto end;
+ }
+
+ if (caa_unlikely(trigger_consumption_paused)) {
+ DBG("Trigger consumption paused, sleeping...");
+ sleep(1);
+ goto end;
+ }
+
+ ret = handle_notification_thread_event(state, fd, domain);
+ if (ret) {
+ ERR("[notification-thread] Event sample handling error occurred for fd: %d", fd);
+ ret = -1;
+ goto end;
+ }
+
+end:
+ return ret;
+}
+
+/*
+ * Return the event source domain type via parameter.
+ */
+static bool fd_is_event_source(struct notification_thread_handle *handle, int fd, enum lttng_domain_type *domain)
+{
+ struct notification_event_trigger_source_element *source_element, *tmp;
+
+ assert(domain);
+
+ cds_list_for_each_entry_safe(source_element, tmp,
+ &handle->event_trigger_sources.list, node) {
+ if (source_element->fd != fd) {
+ continue;
+ }
+ *domain = source_element->domain;
+ return true;
+ }
+ return false;
+}
+
/*
* This thread services notification channel clients and commands received
* from various lttng-sessiond components over a command queue.
int ret;
struct notification_thread_handle *handle = data;
struct notification_thread_state state;
+ enum lttng_domain_type domain;
DBG("[notification-thread] Started notification thread");
+ health_register(health_sessiond, HEALTH_SESSIOND_TYPE_NOTIFICATION);
+ rcu_register_thread();
+ rcu_thread_online();
+
if (!handle) {
ERR("[notification-thread] Invalid thread context provided");
goto end;
}
- rcu_register_thread();
- rcu_thread_online();
-
- health_register(health_sessiond, HEALTH_SESSIOND_TYPE_NOTIFICATION);
health_code_update();
ret = init_thread_state(handle, &state);
goto end;
}
+ if (testpoint(sessiond_thread_notification)) {
+ goto end;
+ }
+
while (true) {
int fd_count, i;
if (ret) {
goto error;
}
+ } else if (fd_is_event_source(handle, fd, &domain)) {
+ ret = handle_trigger_event_pipe(fd, domain, revents, &state);
+ if (ret) {
+ goto error;
+ }
} else {
/* Activity on a client's socket. */
if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) {
exit:
error:
fini_thread_state(&state);
- health_unregister(health_sessiond);
+end:
rcu_thread_offline();
rcu_unregister_thread();
-end:
+ health_unregister(health_sessiond);
return NULL;
}
projects / lttng-tools.git / blobdiff